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« 10 Tips and Techniques to help you become a more successful Fine-Art Long Exposure Photographer! | Main | New Phase One IQ260 Digital Back for Long Exposures! »

1 Hour Exposure with the Phase One IQ 260:

Hello everyone,

I am really excited to share the following images with you all!

I had the privilege to be among the first to test the new Phase One IQ260 medium format digital back for some really long exposures. The good folks of Digital Transitions put on one of the first IQ series launch events in New York City in March of this year. At this event, Phase One's Hardware Engineering Manager, Jacob Sune Sørensen, showed off three prototype IQ260 units. Not only did I get to see an IQ260, I actually got to photograph a series of images including a full one hour exposure of the New York City skyline (shot from Brooklyn Bridge Park).

3600 seconds exposure @F8. Phase One DF+ Camera with IQ 260 Digital Back. 45mm Lens. ISO 140. Long exposure mode.

I have to extend my sincere thanks to the incredible team at Digital Transitions, who put on an world-class event. In particular, I'd like to thank Doug Peterson and Michelle Matthews (but all of he team I met was great to deal with). Not only was I able to see, touch and use the equipment, I got all my questions answered and connected with like-minded photographers. I felt completely taken care of, even enjoyed some gourmet sandwiches and cold drinks -:). If you're thinking of going Phase One, I'd highly recommend contacting the team of Digital Transitions.

The day after the launch event, Phase One's Jacob Sune Sørensen took me out for a private shooting session. That's when we created the image above, as well as the 2 images posted below:

480 seconds exposure @F11. Phase One DF+ Camera with IQ 260 Digital Back. 45mm Lens. ISO 140. Long exposure mode.

900 seconds exposure @F11. Phase One DF+ Camera with IQ 260 Digital Back. 45mm Lens. ISO 140. Long exposure mode.

In the first image above, you can see the increased detail in the clouds as the exposure time was 'only' 8 minutes compared to the full 1 hour exposure I posted above. Apart from that, both images look very similar though, as the water is blurred after about 2 minutes exposure time (so extending the exposure has no added visual effects).

The second image is a 15 minute exposure of the skyline taken from a nearby location. I am blown away by how much tonality and detail is captured in the clouds, as well as the buildings.

To create all of these images, I used several ND filters ranging from 16 to 20 stops in total. Keep in mind that the IQ260 'uses' an ISO of 140 so to pull off such long exposures so in broad day-light very strong filtration is necessary. My Phase One P45+ back operated at ISO 50, so I typically used 13 - 16 stops of ND filtration.

While shooting, we also had an opportunity to test the wireless capability of this new back. Using an Ipad, we were able to evaluate the image and check for sharpness and exposure. We also were able to fire the camera remotely from the iPad, thereby eliminating any chance of accidental camera shake while doing the long exposures. I wasn't anticipating to find the wireless capability very applicable for my particular workflow, but it turned to be a very valuable feature.

The images above have all been processed in Capture One 7, Photoshop CS6 and Silver Efex Pro 2. For those who know my work, you might recognize the grain I very much like to add. The image below is a screen-shot of the original color RAW files, comparing sharpness and noise. The image on the left is a 'regular' shot taken at 1/200 second and ISO 50 (which is native to the IQ 260). The image on the right is a full 1 hour exposure, also shot at F8, but the ISO has been adjusted to 140 as required by the long exposure mode.

As you can see, the quality of this new IQ260 digital back is simply outstanding. Despite the fact that my P45+ was 'rated' to do long exposures up to 1 hour as well, I usually stayed away from such long times. Evaluating the performance of the IQ260, however, makes me want to explore even longer exposures. Even at a full hour, I can hardly see any noise, and sharpness is retained very effectively. I could see a (very) slight loss in dynamic range, likely resulting from shifting ISO from 50 to 140 (required by the long exposure mode), but for most scenes this will be negligible. Without hesitation, this new digital back delivers the highest quality long exposure image quality of any digital camera system I have ever tested. By a huge margin!

keep in mind that I was using a prototype for these images, so finally image quality of production IQ260's can be expected to be even higher.

The Verdict:

So should you get an IQ260? Well, I'd expect the price to be the biggest hurdle to potential ownership (it certainly is for me -:). But for those who can afford one, rest assured you will be working with the highest quality digital camera out there. Yes there is the IQ280 with its increased resolution of 80 megapixels, but for anyone looking to do long exposures, the IQ260 is the clear choice.

In summary, here are my thoughts on the strength's of this new medium format digital back:

  • Very high resolution of 60 Megapixel

When I stepped up to a Phase P45+ from my Canon 5D Mark II I really appreciated the increased resolution of 39 megapixels. It gives you the ability to make larger prints, but tonal gradation and transitions are also improved (something that isn't mentioned very often). You can crop your images with ease. But it's not just the amount of pixels, to me the quality is of even greater importance. I certainly see a difference between my D800e files and my P45+, despite the fact that the Phase One 'only' has 3 more megapixels. The new IQ260 with its 60 megapixel resolution will enable me to make even bigger, sharper and more detailed fine-art prints.

  • Highest quality long exposures of up to 1 hour virtually noise-free

In my testing, I was very impressed with the quality of long exposures in particular (as mentioned above). Something else that surprised me, was the ability to do long exposures up to 8 minutes in 'normal' mode and ISO 50. Compared to the IQ160, the previous generation 60 megapixel back, noise levels really increased as soon as you exceeded 1 minute exposure time. Having the flexibility to shoot at ISO 50 for long exposures of up to 8 minutes is a great asset.

  • Very high dynamic range that is rated at 13 f-stops

This feature may not sound impressive, especially compared to the 12.5 f-stop range of the previous IQ160 back. In practice, however, I found this to be a remarkable improvement. Compared to my P45+, this is a big improvement. You can expose for the highlights and pull details out of the shadows, all with virtually no increase in noise. And bracketing is no longer necessary, except in very rare cases...

  • High quality, large image review screen

Compared to my P45+, the IQ260 has a much more usable, high quality touch screen. It makes reviewing images much easier, you can tap to zoom to 100% (actual pixels) and the added virtual horizon makes it easy to level your camera.

  • Wireless capability and connectivity to an iPad and/or iPhone, even your laptop.

As mentioned above, I did not see myself finding use for this feature until I actually got to try it. The ability to see and review your images on a larger screen can be very valuable, especially if that screen is an iPad. In studio, I would be shooting tethered to a full scale computer, but in the field it's nice to have the freedom of a portable solution. Using your ipad or iPhone as a remote shutter release is an added benefit.

  • Inexpensive battery power

After spending 38K on the IQ260 digital back, you'll be pleased to know that extra batteries are actually rather affordable -:) And that's a good thing because you will need plenty, especially when using the wireless features. I'd recommend a minimum of 4 batteries if you're out on a full day shoot, even more if you plan on doing very long exposure of 20 minutes and beyond.

  • Technical cameras

This is probably the most important feature, right after long exposure capabilities (of course). For me, the ability to use a digital back on a technical camera such as the Cambo WDS and RS, is reason enough to leave my D800e at home. I applaud Phase One for continuing to built digital backs with an open platform. Unlike Hasselblad, this opens countless opportunities for the serious photographer who needs and appreciates the ability to use camera movements such as tilts, swings and shifts.

I am going to leave you with one last image here. This is taken while we were shooting the 1 hour exposure. I guess we looked like serious photographers -:)

As always, you can leave your comments and questions below. Thank you for reading...

Marc teaches several workshops and online courses about Fine-Art Long Exposure Photography each year.

Please visit his workshop company, Vancouver Photo Workshops, for more details.

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Reader Comments (10)


Very interesting to see your tests with the IQ260 - you won't be surprised to know that it's on my radar and I hope to be able to test it soon myself too. Id love to catch up one-one to discuss as I've seen a few long exposure colour artifacts with some of the files shared with me by Doug from Iceland etc.

Btw, just got back from Iceland myself shooting the Aurora - would love to join you for the long exposure week in the summer if there's still availability.

Graham (in the 'other' Vancouver)

April 23, 2013 | Unregistered CommenterGraham Welland


great to hear from you!

I am certainly not surprised that the IQ 260 is on your radar. I haven't seen any color artifacts myself, but since I converted to black and white almost immediately, it's possible that I may have missed it. If it is present, it may be due to the backs being prototypes (at least the one Doug I were shooting with).

We can certainly connect on-on-one and discuss this further. I can send you some RAW files of the images posted above, in fact I'll get on that right away for you...

As far as the long exposure workshop in Iceland is concerned, I do belief there still is room. It's organized through Einar at Focus on Nature:

I'll send him an email and mention that you are interested, please feel free to get in touch with him yourself as well.

Hope all is well in 'south' Vancouver!

Talk very soon,


April 24, 2013 | Registered CommenterMarc Koegel

Dear Marc,

such a great test...

I would be extremely curious to see the 100% crops, to see how things really look, but I bet they're superb.

In the preview they look stunning, especially considering the loss of quality you get when stacking filters.

Still wondering if Digital Back / Camera Manufacturers will listen to us 'long exposure guys' and build some system at ISO 12 Native, with 14 stop of DR. :)

April 24, 2013 | Unregistered CommenterLuca Cesari

Stunning images, Marc. Thanks for sharing these. I just wish I could afford one!

Hope to see you again soon.


April 30, 2013 | Unregistered CommenterMark Olwick

Thanks for your comments Luca and Mark!

I am going to post some 100% crops for you Luca - but rest assured they do not disappoint :-)

And I am with you Mark - the price is certainly very steep and just like with good wine or a good stereo system, you gotta pay a very high premium for 'just' a slight increase in quality. But arguably this is the best digital 'camera' money can buy...

May 8, 2013 | Registered CommenterMarc Koegel

Great Article, Marc...and wonderful images from Brooklyn Bridge Park!
For any of those reading this post, you should take advantage of Marc Koegel's Long Exposure Workshops and learn from a Master Photographer.

Rick Hulbert

June 5, 2013 | Unregistered CommenterRick Hulbert

Great review of the IQ260. What I want to ask you is did you or will you review the IQ280. I am curious as to the improvements made in this camera. I would have upgraded in a heartbeat had the IQ280 had the same long exposure mode. But what about improved noise in the IQ280?

The next question I have is about the 13 stop dynamic range. When I was a kid I use to be an audio file. At that time the lower end stereo systems would boast 300 watts. Of course these were peak watts and had no standard of measurement. The higher end systems would rate their systems at RMS watts. I mention this because BMO measured the Sony RX1 at 14.1 stops of dynamic range and even some Nikons are rated at over 13 stops. So when Phase One is making a big deal out of "a measly" 13 stops I am questioning the rating systems of the reviewers. What are your thoughts?

Lastly, why can't the Li-Ion battery in the DF+ be used in the IQ back? Sure would be nice to have longer battery life.

June 5, 2013 | Unregistered CommenterPaul Franklin

Thank you for your comment and recommendation of my workshops Rick!

I belief you have some very interesting workshops also, coming up in Vancouver and abroad. For information, same link applies:


June 6, 2013 | Registered CommenterMarc Koegel

does this back require an additional noise exposure? I find this extra time a real hindrance when shooting especially when doing five minute or so exposures around dusk - by the time i wait five minutes for the back or my 800E to grind out its noise expsure, the light is gone - so i only get one try at it. this applies in a lot of other situations too, ie. half hour cloud exposures, etc. yeah, of course you try to anticipate the best time to take the exposure, but with film i can close the shutter and take another, start over in the middle if conditions warrant it, all that sort of thing - with these dang noise exposures once you open the shutter, you're locked into double time, unless you know of some way to cancel the NR that i don't know about. if so, please tell me it.

June 9, 2013 | Unregistered CommenterWilliam Lesch

Hi Marc,

I purchased the IQ260 recently and started experimenting with the long exposure feature. I am not getting your results. Mostly, my images are very noisy at 4 minutes. And if I try to shoot at ISO 50 in normal mode, the noise level goes completely ballistic.

How are you setting-up and how did you manage to get a noiseless image at 8 minutes with ISO 50?

Please share...



July 14, 2015 | Unregistered CommenterJohnny

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